The exhaustive list of topics in Pulse width Modulation For Power Electronic Converters in which we provide Help with Homework Assignment and Help with Project is as follows:
- Power electronic converters for dc-ac and ac-dc power conversion:
- Electronic switches
- DC-dc buck and boost converters
- H-bridge
- Multilevel converters – diode clamp
- Flying capacitor and cascaded-cell converters
- Voltage source and current source converters
- Evolution of topologies for dc-ac power conversion from dc-dc converters.
- Applications of voltage source converters:
- Applications of voltage source converter
- Motor drives
- Active front-end converters
- Reactive compensators
- Active power filters.
- Purpose of pulsewidth modulation:
- Review of Fourier series
- Fundamental and harmonic voltages
- Machine model for harmonic voltages
- Undesirable effects of harmonic voltages – line current distortion
- Increased losses
- Pulsating torque in motor drives
- Control of fundamental voltage
- Mitigation of harmonics and their adverse effects
- Pulsewidth modulation (PWM) at low switching frequency:
- Square wave operation of voltage source inverter
- PWM with a few switching angles per quarter cycle
- Equal voltage contours
- Selective harmonic elimination
- THD optimized PWM
- Off-line PWM
- Triangle-comparison based PWM:
- Average pole voltages
- Sinusoidal modulation
- Third harmonic injection
- Continuous PWM
- Bus-clamping or discontinuous PWM
- Space vector based PWM:
- Space vector concept and transformation
- Per-phase methods from a space vector perspective
- Space vector based modulation
- Conventional space vector PWM
- Bus-clamping PWM
- Advanced PWM
- Triangle-comparison approach versus space vector approach to PWM
- Analysis of line current ripple:
- Synchronously revolving reference frame
- Error between reference voltage and applied voltage
- Integral of voltage error
- Evaluation of line current ripple
- Hybrid PWM for reduced line current ripple
- Analysis of dc link current:
- Relation between line-side currents and dc link current
- DC link current and inverter state
- Rms dc current ripple over a carrier cycle
- Rms current rating of dc capacitors
- Analysis of torque ripple:
- Evaluation of harmonic torques and rms torque ripple
- Hybrid PWM for reduced torque ripple
- Inverter loss:
- Simplifying assumptions in evaluation of inverter loss
- Dependence of inverter loss on line power factor
- Influence of PWM techniques on switching loss
- Design of PWM for low inverter loss.
- Effect of inverter dead-time effect:
- Requirement of dead-time
- Effect of dead-time on line voltages
- Dependence on power factor and modulation method
- Compensation of dead-time effect.
- Overmodulation:
- Per-phase and space vector approaches to overmodulation
- Average voltages in a synchronously revolvingd-q reference frame
- Low-frequency harmonic distortion
- PWM for multilevel inverter:
- Extensions of sine-triangle PWM to multilevel inverters
- Voltage space vectors
- Space vector based PWM
- Analysis of line current ripple and torque ripple
- Overview of power electronic converters:
- Electronic switches.
- DC - DC converters.
- DC - AC voltage source inverter.
- DC - AC voltage source inverter.
- Multilevel inverter - diode clamped inverter.
- Multilevel inverter - flying capacitor inverter.
- Applications of voltage source converter:
- Applications of voltage source converter
- Purpose of pulsewidth modulation (PWM):
- Review of Fourier series.
- Harmonic voltages and their undesirable effects.
- Pulsewidth modulation at low switching frequency:
- Low switching frequency operation of a VSI
- Selective harmonic elimination and THD optimized PWM.
- Triangle-comparison based PWM:
- Sine-triangle modulation.
- Third harmonic injection PWM (THIPWM).
- Bus-clamping PWM.
- Space vector-based PWM:
- Concept of space vector.
- Conventional space vector PWM and bus-clamping PWM.
- A unified perspective of triangle-comparison and space vector based PWM.
- Advanced bus-clamping PWM.
- Analysis of line current ripple:
- Transformation from stationary reference frame to synchronously revolving dq reference frame.
- Volt-second balance and instantaneous error voltage.
- Calculation of RMS line current ripple.
- Space vector-based hybrid PWM for reduced line current ripple.
- Analysis of dc link current:
- Inverter state and dc link current.
- Average and RMS values of dc link current.
- Analysis of torque ripple:
- Calculation of harmonic torques and RMS torque ripple.
- Hybrid PWM techniques to reduce ripple torque.
- Inverter loss:
- Evaluation of conduction loss.
- Dependence of switching loss on power factor and modulation method.
- PWM techniques for reduced switching loss.
- Effect of inverter dead-time:
- Effect of dead-time with continuous modulation.
- Effect of dead-time with discontinuous or bus-clamping PWM.
- Overmodulation:
- Per-phase approach to overmodulation.
- Space vector approach to overmodulation.
- A perspective from the synchronously revolving d-q reference frame.
- PWM for multilevel inverters:
- Extension of sine-triangle modulation to three-level inverters.
- Extension of conventional space vector modulation to three-level inverters.
- Analysis of line current ripple and torque ripple.